Danielsen, P. L. and Ball, Robin (1985) Interchain coupling in polyacetylene. Journal de Physique, Vol.46 (No.2). pp. 131-137. doi:10.1051/jphys:01985004602013100

Research output not available from this repository, contact author.

Request Changes to record.

Abstract

The interchain coupling between two polyacetylene chains is considered, both in the absence of solitons, and with one neutral soliton on each chain. A new correction to the size and position of the band gap is found in the former case, and when solitons are present it is shown that their mid-gap levels interact. In this case the differences between the matched (same dimerization pattern at ± ∞) and the mismatched cases (opposite pattern at ± ∞) are clearly illustrated. The mid-gap level splitting is found to be ΔE = t> l/ξ sinh l/ξ, in the matched case, and ˜ 0(e-kfξ) in the mismatched case (where l is the soliton separation, kf the Fermi wavevector, ξ the soliton width, and [1] kf ξ ˜ 10). This interaction increases the strength of the 3 D pinning of solitons, there-fore strengthening the case against the solitonic model for conduction in polyacetylene. It also predicts the existence of a critical density ρc ˜ 0.05 of solitons, at which the preferred local ordering between chains switches from mismatched to matched dimerization.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH):	Polyacetylenes, Organic semiconductors, Solitons, Energy gap (Physics), Energy-band theory of solids
Journal or Publication Title:	Journal de Physique
Publisher:	Editions Physique
ISSN:	0302-0738
Official Date:	1985
Dates:	Date Event 1985 Published
Volume:	Vol.46
Number:	No.2
Page Range:	pp. 131-137
DOI:	10.1051/jphys:01985004602013100
Status:	Peer Reviewed
Publication Status:	Published

Data sourced from Thomson Reuters' Web of Knowledge

Request changes or add full text files to a record

Repository staff actions (login required)

View Item